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  • ENERGY STAR Certified Room Air Conditioners | EPA ENERGY STAR
    Using the cooling capacity chart, find your room's square footage in the "Area To be Cooled (square feet)" column, then use the "Capacity Needed (BTUs per hour)" column to choose the correct cooling capacity for your room air conditioner The capacities are calculated based on an 8-foot ceiling
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    Efficiency: ACs start at 13 SEER, though the least efficient from most brands are now 14 or 15 SEER Maximum efficiency increases every year and tops out at 28 SEER with Lennox SL28XCV (024-230A) model for 2022 SEER is Seasonal Energy Efficiency Ratio, a measurement of how effectively the unit uses electricity to move heat from inside to outside
  • 400 sq ft or More ENERGY STAR Certified Air Conditioners
    Shop for 400 sq ft or More ENERGY STAR Certified Air Conditioners at Best Buy Find low everyday prices and buy online for delivery or in-store pick-up
  • 400-Sq. Foot-Maximum Coverage Area Heating Cooling - Lowes
    Supplement your central air conditioning with an easy-mount window air conditioner and control the temperature in the room by adjusting its fan speed Watch for the newer models with a thermostat These units can automatically direct cooled air to the warmest part of a room
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    This 12,000 BTU heat pump offers both heating and cooling capabilities, effectively handling spaces of 400–600 square feet year-round while operating at a noise level as low as 22 dBA indoors — quieter than a whisper
  • Best Window Air Conditioner for Large Room 2025 - PICKHVAC
    Cooling a large room (approximately 400–700 sq ft ) requires a window air conditioner with high BTU output, energy efficiency, and reliable performance In this article, we review the best window-mounted AC units for large rooms and compare their cooling power, noise levels, special features like smart connectivity, and more
  • The Best Air Conditioners of 2025, Tested and Reviewed
    The Midea U Inverter Window Air Conditioner features a unique design that allows you to open the window when it's installed, and it's one of two ACs to earn Energy Star Most Efficient
  • Room Air Conditioners - ENERGY STAR
    Most ENERGY STAR certified room air conditioners include variable speed technology that saves even more energy and quietly keeps you cool, giving you innovation and energy savings in a state-of-the-art room AC





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